[RISCV] Add missing dependency check for Zvkb (#79467)

Author: 4vtomat

clang/test/Driver/riscv-toolchain-gcc-multilib-reuse.c

@@ -66,7 +66,7 @@
 // RUN:   -target riscv64-unknown-elf \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk \
 // RUN:   --print-multi-directory \
-// RUN:   -march=rv32i_zvkb -mabi=ilp32 \
+// RUN:   -march=rv32iv_zvkb -mabi=ilp32 \
 // RUN:   | FileCheck -check-prefix=GCC-MULTI-LIB-REUSE-RV32I_ZVKB-ILP32 %s
 // GCC-MULTI-LIB-REUSE-RV32I_ZVKB-ILP32: rv32i/ilp32
 // GCC-MULTI-LIB-REUSE-RV32I_ZVKB-ILP32-NOT: {{^.+$}}

llvm/lib/Support/RISCVISAInfo.cpp

@@ -976,8 +976,8 @@ Error RISCVISAInfo::checkDependency() {
         errc::invalid_argument,
         "'zvbc' requires 'v' or 'zve64*' extension to also be specified");
 
-  if ((Exts.count("zvkg") || Exts.count("zvkned") || Exts.count("zvknha") ||
-       Exts.count("zvksed") || Exts.count("zvksh")) &&
+  if ((Exts.count("zvkb") || Exts.count("zvkg") || Exts.count("zvkned") ||
+       Exts.count("zvknha") || Exts.count("zvksed") || Exts.count("zvksh")) &&
       !HasVector)
     return createStringError(
         errc::invalid_argument,